<img src="icon/arrow_up.gif"/>The tabs above are defined in <b>index.html</b> "header_tabs" section with id "t1", "t2", "t3" ... respectively<br/>
<img src="icon/star.gif"/>This part is an optional helper, named exactly after the tab it belongs to, a.k.a., <b>"t2.html"</b> in this case.<br/>
<img src="icon/arrow_down.gif"/>And 3 columns defined in section "main", namely "c1", "c2" and "c3", which shall be enough for most cases.